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rocksdb/utilities/memory/memory_test.cc

274 lines
9.4 KiB

// Copyright (c) 2013, Facebook, Inc. All rights reserved.
// This source code is licensed under the BSD-style license found in the
// LICENSE file in the root directory of this source tree. An additional grant
// of patent rights can be found in the PATENTS file in the same directory.
#ifndef ROCKSDB_LITE
#include "db/db_impl.h"
#include "rocksdb/cache.h"
#include "rocksdb/table.h"
#include "rocksdb/utilities/memory_util.h"
#include "rocksdb/utilities/stackable_db.h"
#include "table/block_based_table_factory.h"
#include "util/string_util.h"
#include "util/testharness.h"
#include "util/testutil.h"
namespace rocksdb {
class MemoryTest : public testing::Test {
public:
MemoryTest() : kDbDir(test::TmpDir() + "/memory_test"), rnd_(301) {
assert(Env::Default()->CreateDirIfMissing(kDbDir).ok());
}
std::string GetDBName(int id) { return kDbDir + "db_" + ToString(id); }
std::string RandomString(int len) {
std::string r;
test::RandomString(&rnd_, len, &r);
return r;
}
void UpdateUsagesHistory(const std::vector<DB*>& dbs) {
std::map<MemoryUtil::UsageType, uint64_t> usage_by_type;
ASSERT_OK(GetApproximateMemoryUsageByType(dbs, &usage_by_type));
for (int i = 0; i < MemoryUtil::kNumUsageTypes; ++i) {
usage_history_[i].push_back(
usage_by_type[static_cast<MemoryUtil::UsageType>(i)]);
}
}
void GetCachePointersFromTableFactory(
const TableFactory* factory,
std::unordered_set<const Cache*>* cache_set) {
const BlockBasedTableFactory* bbtf =
dynamic_cast<const BlockBasedTableFactory*>(factory);
if (bbtf != nullptr) {
const auto bbt_opts = bbtf->table_options();
cache_set->insert(bbt_opts.block_cache.get());
cache_set->insert(bbt_opts.block_cache_compressed.get());
}
}
void GetCachePointers(const std::vector<DB*>& dbs,
std::unordered_set<const Cache*>* cache_set) {
cache_set->clear();
for (auto* db : dbs) {
// Cache from DBImpl
StackableDB* sdb = dynamic_cast<StackableDB*>(db);
DBImpl* db_impl = dynamic_cast<DBImpl*>(sdb ? sdb->GetBaseDB() : db);
if (db_impl != nullptr) {
cache_set->insert(db_impl->TEST_table_cache());
}
// Cache from DBOptions
cache_set->insert(db->GetDBOptions().row_cache.get());
// Cache from table factories
std::unordered_map<std::string, const ImmutableCFOptions*> iopts_map;
if (db_impl != nullptr) {
ASSERT_OK(db_impl->TEST_GetAllImmutableCFOptions(&iopts_map));
}
for (auto pair : iopts_map) {
GetCachePointersFromTableFactory(pair.second->table_factory, cache_set);
}
}
}
Status GetApproximateMemoryUsageByType(
const std::vector<DB*>& dbs,
std::map<MemoryUtil::UsageType, uint64_t>* usage_by_type) {
std::unordered_set<const Cache*> cache_set;
GetCachePointers(dbs, &cache_set);
return MemoryUtil::GetApproximateMemoryUsageByType(dbs, cache_set,
usage_by_type);
}
const std::string kDbDir;
Random rnd_;
std::vector<uint64_t> usage_history_[MemoryUtil::kNumUsageTypes];
};
TEST_F(MemoryTest, SharedBlockCacheTotal) {
std::vector<DB*> dbs;
std::vector<uint64_t> usage_by_type;
const int kNumDBs = 10;
const int kKeySize = 100;
const int kValueSize = 500;
Options opt;
opt.create_if_missing = true;
opt.write_buffer_size = kKeySize + kValueSize;
opt.max_write_buffer_number = 10;
opt.min_write_buffer_number_to_merge = 10;
BlockBasedTableOptions bbt_opts;
bbt_opts.block_cache = NewLRUCache(4096 * 1000 * 10);
for (int i = 0; i < kNumDBs; ++i) {
DestroyDB(GetDBName(i), opt);
DB* db = nullptr;
ASSERT_OK(DB::Open(opt, GetDBName(i), &db));
dbs.push_back(db);
}
std::vector<std::string> keys_by_db[kNumDBs];
// Fill one memtable per Put to make memtable use more memory.
for (int p = 0; p < opt.min_write_buffer_number_to_merge / 2; ++p) {
for (int i = 0; i < kNumDBs; ++i) {
for (int j = 0; j < 100; ++j) {
keys_by_db[i].emplace_back(RandomString(kKeySize));
dbs[i]->Put(WriteOptions(), keys_by_db[i].back(),
RandomString(kValueSize));
}
dbs[i]->Flush(FlushOptions());
}
}
for (int i = 0; i < kNumDBs; ++i) {
for (auto& key : keys_by_db[i]) {
std::string value;
dbs[i]->Get(ReadOptions(), key, &value);
}
UpdateUsagesHistory(dbs);
}
for (size_t i = 1; i < usage_history_[MemoryUtil::kMemTableTotal].size();
++i) {
// Expect EQ as we didn't flush more memtables.
ASSERT_EQ(usage_history_[MemoryUtil::kTableReadersTotal][i],
usage_history_[MemoryUtil::kTableReadersTotal][i - 1]);
}
for (int i = 0; i < kNumDBs; ++i) {
delete dbs[i];
}
}
TEST_F(MemoryTest, MemTableAndTableReadersTotal) {
std::vector<DB*> dbs;
std::vector<uint64_t> usage_by_type;
std::vector<std::vector<ColumnFamilyHandle*>> vec_handles;
const int kNumDBs = 10;
const int kKeySize = 100;
const int kValueSize = 500;
Options opt;
opt.create_if_missing = true;
opt.create_missing_column_families = true;
opt.write_buffer_size = kKeySize + kValueSize;
opt.max_write_buffer_number = 10;
opt.min_write_buffer_number_to_merge = 10;
std::vector<ColumnFamilyDescriptor> cf_descs = {
{kDefaultColumnFamilyName, ColumnFamilyOptions(opt)},
{"one", ColumnFamilyOptions(opt)},
{"two", ColumnFamilyOptions(opt)},
};
for (int i = 0; i < kNumDBs; ++i) {
DestroyDB(GetDBName(i), opt);
std::vector<ColumnFamilyHandle*> handles;
dbs.emplace_back();
vec_handles.emplace_back();
ASSERT_OK(DB::Open(DBOptions(opt), GetDBName(i), cf_descs,
&vec_handles.back(), &dbs.back()));
}
// Fill one memtable per Put to make memtable use more memory.
for (int p = 0; p < opt.min_write_buffer_number_to_merge / 2; ++p) {
for (int i = 0; i < kNumDBs; ++i) {
for (auto* handle : vec_handles[i]) {
dbs[i]->Put(WriteOptions(), handle, RandomString(kKeySize),
RandomString(kValueSize));
UpdateUsagesHistory(dbs);
}
}
}
// Expect the usage history is monotonically increasing
for (size_t i = 1; i < usage_history_[MemoryUtil::kMemTableTotal].size();
++i) {
ASSERT_GT(usage_history_[MemoryUtil::kMemTableTotal][i],
usage_history_[MemoryUtil::kMemTableTotal][i - 1]);
ASSERT_GT(usage_history_[MemoryUtil::kMemTableUnFlushed][i],
usage_history_[MemoryUtil::kMemTableUnFlushed][i - 1]);
ASSERT_EQ(usage_history_[MemoryUtil::kTableReadersTotal][i],
usage_history_[MemoryUtil::kTableReadersTotal][i - 1]);
}
size_t usage_check_point = usage_history_[MemoryUtil::kMemTableTotal].size();
std::vector<Iterator*> iters;
// Create an iterator and flush all memtables for each db
for (int i = 0; i < kNumDBs; ++i) {
iters.push_back(dbs[i]->NewIterator(ReadOptions()));
dbs[i]->Flush(FlushOptions());
for (int j = 0; j < 100; ++j) {
std::string value;
dbs[i]->Get(ReadOptions(), RandomString(kKeySize), &value);
}
UpdateUsagesHistory(dbs);
}
for (size_t i = usage_check_point;
i < usage_history_[MemoryUtil::kMemTableTotal].size(); ++i) {
// Since memtables are pinned by iterators, we don't expect the
// memory usage of all the memtables decreases as they are pinned
// by iterators.
ASSERT_GE(usage_history_[MemoryUtil::kMemTableTotal][i],
usage_history_[MemoryUtil::kMemTableTotal][i - 1]);
// Expect the usage history from the "usage_decay_point" is
// monotonically decreasing.
ASSERT_LT(usage_history_[MemoryUtil::kMemTableUnFlushed][i],
usage_history_[MemoryUtil::kMemTableUnFlushed][i - 1]);
// Expect the usage history of the table readers increases
// as we flush tables.
ASSERT_GT(usage_history_[MemoryUtil::kTableReadersTotal][i],
usage_history_[MemoryUtil::kTableReadersTotal][i - 1]);
ASSERT_GT(usage_history_[MemoryUtil::kCacheTotal][i],
usage_history_[MemoryUtil::kCacheTotal][i - 1]);
}
usage_check_point = usage_history_[MemoryUtil::kMemTableTotal].size();
for (int i = 0; i < kNumDBs; ++i) {
delete iters[i];
UpdateUsagesHistory(dbs);
}
for (size_t i = usage_check_point;
i < usage_history_[MemoryUtil::kMemTableTotal].size(); ++i) {
// Expect the usage of all memtables decreasing as we delete iterators.
ASSERT_LT(usage_history_[MemoryUtil::kMemTableTotal][i],
usage_history_[MemoryUtil::kMemTableTotal][i - 1]);
// Since the memory usage of un-flushed memtables is only affected
// by Put and flush, we expect EQ here as we only delete iterators.
ASSERT_EQ(usage_history_[MemoryUtil::kMemTableUnFlushed][i],
usage_history_[MemoryUtil::kMemTableUnFlushed][i - 1]);
// Expect EQ as we didn't flush more memtables.
ASSERT_EQ(usage_history_[MemoryUtil::kTableReadersTotal][i],
usage_history_[MemoryUtil::kTableReadersTotal][i - 1]);
}
for (int i = 0; i < kNumDBs; ++i) {
for (auto* handle : vec_handles[i]) {
delete handle;
}
delete dbs[i];
}
}
} // namespace rocksdb
int main(int argc, char** argv) {
#if !(defined NDEBUG) || !defined(OS_WIN)
::testing::InitGoogleTest(&argc, argv);
return RUN_ALL_TESTS();
#else
return 0;
#endif
}
#else
#include <cstdio>
int main(int argc, char** argv) {
printf("Skipped in RocksDBLite as utilities are not supported.\n");
return 0;
}
#endif // !ROCKSDB_LITE